Parking mechanism and agricultural gearbox with same

Abstract

The invention relates to the technical field of agricultural parking mechanisms, and particularly discloses a parking mechanism which comprises a brake component, the brake component comprises a brake cover, the front end of the brake cover is rotationally connected with a lifting rod, the inner wall of the brake cover is fixedly connected with a positioning shaft, the positioning shaft is rotationally connected with a pair of brake shoes, and a pair of brake pads are arranged on the brake shoes. A brake hub is further arranged in the brake cover. According to the parking mechanism, through rotation of the brake shoe, the flow blocking plate starts to rotate to form a closed channel, meanwhile, the pressing plate is pushed to ascend to abut against the blocking piece, the liquid pushing plate can start to rotate along with the brake hub, hydraulic oil is pushed, and the braking effect is achieved through hydraulic pressure before the brake pad does not act; therefore, the defect of braking lag of the brake pad is overcome, the brake pad can be matched subsequently to achieve the braking effect, and the situation that the service life of a friction plate is affected due to friction loss caused by the fact that friction force borne by the brake pad is too large is effectively avoided.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural parking mechanisms, and in particular to a parking mechanism and an agricultural gearbox having the parking mechanism. Background Art

[0002] A crawler agricultural vehicle is a vehicle specially designed for agricultural operations. Its main feature is the crawler drive system. This design enables the vehicle to travel on uneven or soft ground, reducing soil compaction while improving traction. The agricultural transmission used in traditional crawler agricultural vehicles has its own brake mechanism and parking mechanism. The brake mechanism is used to stop the vehicle while it is moving, while the parking mechanism can help the vehicle to stop even on a slope.

[0003] The existing parking mechanism of agricultural transmission adopts the braking method of the brake pad and the brake hub. However, this kind of brake pad braking is slightly delayed. The vehicle can still move for a period of time before the brake pad and the brake hub are in contact. Even if the brake pad and the brake hub are in contact for a period of time, the vehicle may still move forward due to insufficient friction, and the brake pad will also have violent friction. These two periods of time are parking windows, and there is a lack of mechanism to assist the brake pad in braking in advance during this time. In addition, the brake pad is squeezed and rubbed against the brake hub for a long time, resulting in a limited life of the brake pad. There is a lack of mechanism that can assist the brake pad in braking during parking to share the friction of the brake pad. Summary of the invention

[0004] The object of the present invention is to provide a parking mechanism to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A parking mechanism, comprising a brake component, wherein the brake component comprises a brake cover, the front end of the brake cover is rotatably connected to a lifting rod, the inner wall of the brake cover is fixedly connected to a positioning shaft, a pair of brake shoes are rotatably connected to the positioning shaft, a pair of brake pads are arranged on the brake shoes, a brake hub is also arranged in the brake cover, the brake hub is connected to a transmission shaft, a bent angle protrusion is rotatably connected in the brake cover, and a driving shaft is fixedly connected to the side end of the lifting rod;

[0007] The brake hub is provided with a cavity filled with hydraulic oil, and a flow-blocking component is provided in the cavity, the flow-blocking component includes a flow-blocking plate, and the angled protrusion rotates with the flow-blocking plate during the rotation process, so as to prevent the hydraulic oil from passing through one side of the flow-blocking plate;

[0008] A hydraulically assisted braking component is arranged in the brake hub, and the hydraulically assisted brake includes a fluid pushing plate and a baffle. The brake hub includes an outer ring and an inner ring rotatably connected to the outer ring. The fluid pushing plate is arranged on the inner ring, and the baffle is fixedly connected to the inner wall of the outer ring. During the rotation of the brake shoe, the fluid pushing plate and the baffle collide with each other, forcing the brake hub to rotate with the fluid pushing plate during rotation, and cooperate with the baffle to use hydraulic pressure to assist braking.

[0009] Furthermore, the baffle component also includes a first rotating shaft rotatably connected to the inner wall of the outer ring, the inner wall of the baffle plate is fixedly sleeved with the outer wall of the first rotating shaft, the inner wall of the angled protrusion is fixedly connected with a second rotating shaft, a first pulley is fixedly sleeved on the first rotating shaft, a second pulley is fixedly sleeved on the second rotating shaft, and a transmission belt is provided on the first pulley and the second pulley.

[0010] Furthermore, the hydraulically assisted braking component also includes a push rod slidably connected to the inner wall of the inner ring, the top of the push rod is fixedly connected to an arc plate, the bottom of the liquid pushing plate is provided with a first movable groove, the arc plate slides inside the first movable groove, the top of the arc plate is fixedly connected to a push shaft, the top of the push shaft is fixedly connected to a pressure plate, the top of the liquid pushing plate is provided with a second movable groove, and the pressure plate is slidably connected to the inside of the second movable groove.

[0011] Furthermore, a groove is provided on the fluid pushing plate, and the hydraulic oil flows in the groove. During the rotation of the brake shoe, the pressure plate extends and contacts the baffle, so that the brake hub is subjected to resistance of the hydraulic oil during the rotation.

[0012] Furthermore, a flow limiting component is arranged on the liquid pushing plate, and the flow limiting component includes a first baffle and a second baffle, and the first baffle and the second baffle are both slidably connected to the inside of the groove, and the first baffle and the second baffle are initially located in the middle of the groove. During the activity of the liquid pushing plate, the first baffle is driven to move upward and the second baffle is driven downward, or the first baffle is driven downward and the second baffle is driven upward until the groove is blocked.

[0013] Furthermore, the flow limiting component also includes a liquid guide plate fixedly connected to the inner wall of the groove, the groove is rotatably connected to a driving rod, a plurality of blades are fixedly connected to the driving rod, the first baffle is internally threadedly connected to a first screw rod, the second baffle is internally threadedly connected to a second screw rod, and a transmission component is provided at the bottom of the driving rod. During the flow of the liquid, the first screw rod and the second screw rod are rotated, and the first baffle and the second baffle are driven to start moving through the transmission component.

[0014] Furthermore, the transmission component includes a first transmission gear fixedly sleeved on the outer end of the first screw rod, the outer end of the second screw rod is fixedly sleeved with a second transmission gear, the first transmission gear is meshingly connected with the second transmission gear, the outer end of the second screw rod is also fixedly sleeved with a first friction wheel, the outer end of the driving rod is fixedly sleeved with a second friction wheel, the first friction wheel and the second friction wheel are sleeved with friction belts, and the driving rod is also sleeved with a spring roll.

[0015] Furthermore, the push rod is a telescopic structure, and an elastic mechanism is arranged inside, and a reset member is arranged on the inner ring.

[0016] An agricultural gearbox with the parking mechanism includes the parking mechanism, and is characterized in that it includes a gearbox body, the gearbox body includes a shell, a gear set is arranged inside the shell, the gear set includes an output gear, an output shaft is fixedly sleeved on the output gear, and the output shaft is fixedly connected to the brake hub.

[0017] In the above technical solution, the parking mechanism provided by the present invention has the following beneficial effects:

[0018] The rotation of the brake shoe not only makes the spoiler start to rotate to form a closed channel, but also pushes the pressure plate up to contact the baffle, so that the push plate can start to rotate with the brake hub and push the hydraulic oil. Before the brake pad takes effect, the hydraulic pressure is used to brake first, thereby solving the brake lag shortcoming of the brake pad itself. Later, it can also cooperate with the brake pad to achieve the braking effect, which can prevent the brake pad from bearing too much friction, resulting in friction loss and affecting the life of the friction pad.

[0019] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0020] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0022] Figure 1 A schematic diagram of the overall internal structure of the agricultural transmission case provided with the parking mechanism of the present invention;

[0023] Figure 2A schematic diagram of the structure of the outer portion of the output shaft of the agricultural transmission case having the parking mechanism of the present invention;

[0024] Figure 3 A schematic diagram of the internal structure of the brake cover provided by the parking mechanism of the present invention;

[0025] Figure 4 A schematic diagram of the internal structure of the brake hub provided by the parking mechanism of the present invention;

[0026] Figure 5 A schematic cross-sectional view of the brake hub provided for the parking mechanism of the present invention;

[0027] Figure 6 The parking mechanism provided by the present invention Figure 5 A schematic diagram of the enlarged structure at point A;

[0028] Figure 7 A schematic diagram of the specific structure of the brake hub provided by the parking mechanism of the present invention;

[0029] Figure 8 A schematic diagram of the external structure of the liquid pusher plate provided for the parking mechanism of the present invention;

[0030] Fig. 9 A schematic cross-sectional view of the structure of a liquid pusher plate provided for the parking mechanism of the present invention;

[0031] Fig.10 A schematic diagram of the structure of a current limiting component provided for the parking mechanism of the present invention;

[0032] Fig.11 A schematic diagram of the transmission component structure provided for the parking mechanism of the present invention.

[0033] Description of reference numerals:

[0034] 1. Gearbox body; 11. Housing; 12. Gear set; 13. Output shaft; 14. Output gear; 2. Braking component; 21. Brake cover; 22. Lifting rod; 23. First return spring; 24. Positioning shaft; 25. Brake shoe; 26. Brake pad; 27. Brake hub; 271. Inner ring; 272. Outer ring; 28. Angle convex block; 29. ​​Push shaft; 210. Second return spring; 3. Hydraulic auxiliary brake component; 31. Cavity; 32. Push plate; 33. Push rod; 34. Blocking plate; 35. Push shaft; 36. Second movable groove; 3 7. Arc plate; 38. Pressure plate; 4. Flow-blocking component; 41. First rotating shaft; 42. Flow-blocking plate; 43. Second rotating shaft; 44. First pulley; 45. Second pulley; 46. Transmission belt; 5. Current-limiting component; 51. First baffle plate; 52. Second baffle plate; 53. First screw rod; 54. Second screw rod; 56. Liquid guide plate; 57. Drive rod; 58. Blade; 6. Transmission component; 61. First transmission gear; 62. Second transmission gear; 63. First friction wheel; 64. Second friction wheel; 65. Friction belt; 66. Spring roll. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0036] See also Figure 3-4 A parking mechanism includes a brake component 2, the brake component 2 includes a brake cover 21, the front end of the brake cover 21 is rotatably connected to a lifting rod 22, the inner wall of the brake cover 21 is fixedly connected to a positioning shaft 24, a pair of brake shoes 25 are rotatably connected to the positioning shaft 24, a pair of brake pads 26 are arranged on the brake shoes 25, a brake hub 27 is further arranged in the brake cover 21, the brake hub 27 is connected to the transmission shaft, a bent angle protrusion 28 is rotatably connected in the brake cover 21, and a driving shaft 29 is fixedly connected to the side end of the lifting rod 22;

[0037] See also Figure 5-7A cavity 31 is provided in the brake hub 27, and the cavity 31 is filled with hydraulic oil. A baffle component 4 is provided in the cavity 31, and the baffle component 4 includes a baffle plate 42. The corner protrusion 28 rotates with the baffle plate 42 during rotation to prevent the hydraulic oil from passing through one side of the baffle plate 42; a hydraulic auxiliary brake component 3 is provided in the brake hub 27, and the hydraulic auxiliary brake component 3 includes a liquid pushing plate 32 and a baffle plate 34. The brake hub 27 includes an outer ring 272 and an inner ring 271 rotatably connected to the outer ring 272. The liquid pushing plate 32 is arranged on the inner ring 271, and the baffle plate 34 is fixedly connected to the inner wall of the outer ring 272. During the rotation of the brake shoe 25, the liquid pushing plate 32 and the baffle plate 34 conflict with each other, forcing the brake hub 27 to rotate with the liquid pushing plate 32 during rotation, and cooperate with the baffle plate 42 to use hydraulic pressure to assist braking.

[0038] Specifically, the brake cover 21 includes a cover body and a front cover. The front cover is detachably connected to the cover body by bolts. An arc groove is provided on the front cover. The push shaft 29 moves inside the arc groove. A round hole is provided on the lifting rod 22. A first return spring 23 is provided on the round hole. The bottom hook of the first return spring 23 is hung in the round hole, and the top hook is hung on the outer end of the front cover. A pair of second return springs 210 are fixedly connected between a pair of brake shoes 25.

[0039] Specifically, the driving force for the rotation of the lifting rod 22 relies on the power of the hydraulic drive (this is the prior art and will not be described in detail here).

[0040] When the car stops, since the car is on a slope, it will still move under the action of gravity. At this time, the lifting rod 22 is lifted, and the brake pad 26 is close to the brake hub 27. During this process, the spoiler 42 starts to rotate, and the push plate 32 has started to rotate with the brake hub 27 and pushes the hydraulic oil. Before the brake pad 26 takes effect, the hydraulic pressure is used to brake first, thereby solving the brake lag disadvantage of the brake pad 26 itself.

[0041] In an embodiment further provided by the present invention, the baffle component 4 also includes a first rotating shaft 41 rotatably connected to the inner wall of the outer ring 272, the inner wall of the baffle plate 42 is fixedly sleeved with the outer wall of the first rotating shaft 41, the inner wall of the angled protrusion 28 is fixedly connected with a second rotating shaft 43, a first pulley 44 is fixedly sleeved on the first rotating shaft 41, a second pulley 45 is fixedly sleeved on the second rotating shaft 43, a transmission belt 46 is provided on the first pulley 44 and the second pulley 45, and the first pulley 44 and the second pulley 45 are both transmission-connected to the transmission belt 46.

[0042] See also Figure 8-9Furthermore, the hydraulically assisted braking component 3 also includes a push rod 33 slidably connected to the inner wall of the inner ring 271, the top of the push rod 33 is fixedly connected to an arc plate 37, the bottom of the liquid pushing plate 32 is provided with a first movable groove, the arc plate 37 slides inside the first movable groove, the top of the arc plate 37 is fixedly connected to a push shaft 35, the top of the push shaft 35 is fixedly connected to a pressure plate 38, the top of the liquid pushing plate 32 is provided with a second movable groove 36, and the pressure plate 38 is slidably connected to the inside of the second movable groove 36.

[0043] Furthermore, a groove is formed on the push plate 32, and hydraulic oil flows in the groove. During the rotation of the brake shoe 25, the pressure plate 38 extends and contacts the baffle 34, so that the brake hub 27 is subjected to resistance of the hydraulic oil during the rotation.

[0044] Specifically, the outer end of the baffle 34 is arc-shaped, which is adapted to the inner wall of the outer ring 272. The top of the pressure plate 38 is provided with an arc chamfer, which is adapted to the baffle 34. The liquid pushing plate 32 is slidably connected to the inner wall of the inner ring 271. A protrusion is provided at the outer end of the brake shoe 25 near the positioning shaft 24.

[0045] Initially, the brake hub 27 rotates together with the car wheel. At this time, the pressure plate 38 is retracted in the second movable groove 36. During the rotation of the outer ring 272, the fluid pushing plate 32 will not be pushed to rotate. The fluid pushing plate 32 and the inner ring 271 are relatively stationary. When the lifting rod 22 is rotated, the angle protrusion 28 starts to rotate, and the protrusion is used to expand a pair of brake shoes 25 outward.

[0046] On the one hand, when the angled projection 28 rotates, it first rotates with the first pulley 44, and then rotates with the second pulley 45 by means of the transmission belt 46, thereby rotating the baffle 42 to prevent the liquid from flowing.

[0047] On the other hand, during the rotation of the brake shoe 25, the push rod 33 is moved by the convex block, the push rod 33 pushes the arc plate 37 to move, and the arc plate 37 pushes the push shaft 35 to move, so that the pressure plate 38 moves outward and is resisted by the rotating baffle 34, thereby driving the liquid push plate 32 to rotate, so that the liquid provides rotation resistance to the outer ring 272.

[0048] The push rod 33 is a telescopic structure and is provided with an elastic mechanism therein. A reset member is fixedly connected between the inner ring 271 and the brake cover 21 . The reset member is an elastic rope. A pressure spring is fixedly connected between the bottom of the pressure plate 38 and the inner wall of the second movable groove 36 .

[0049] When the brake shoe 25 is released, the push rod 33 will gradually reset due to the lack of resistance from the brake pad 26, and the pressure plate 38 will also retract into the second movable groove 36 under the action of the pressure spring. Then, the pressure from the baffle 34 is lost, and under the action of the reset member, the inner ring 271 and the push plate 32 return to their initial positions.

[0050] The push rod 33 is a telescopic mechanism, including an outer rod and an inner rod. The outer rod slides inside the inner rod, and a compression spring is provided inside the inner rod, so that the push rod 33 can be telescopic. In the process of following the rotation of the outer ring 272, since the brake pad 26 is close to the inner ring 271, it will always press against the push rod 33, so that the push rod 33 can also keep pushing the pressure block to expose the second movable groove 36 and contact with the blocking plate 34.

[0051] See also Figure 10-11 In an embodiment further provided by the present invention, a flow limiting component 5 is provided on the liquid pushing plate 32, and the flow limiting component 5 includes a first baffle plate 51 and a second baffle plate 52. The first baffle plate 51 and the second baffle plate 52 are both slidably connected to the inside of the groove. The first baffle plate 51 and the second baffle plate 52 are initially located in the middle of the groove. During the activity of the liquid pushing plate 32, the first baffle plate 51 is driven to move upward and the second baffle plate 52 is driven to move downward, or the first baffle plate 51 is driven to move downward and the second baffle plate 52 is driven to move upward until the groove is blocked.

[0052] The flow limiting component 5 also includes a liquid guide plate 56 fixedly connected to the inner wall of the groove, a driving rod 57 is rotatably connected to the groove, a plurality of blades 58 are fixedly connected to the driving rod 57, the first baffle plate 51 is internally threadedly connected to the first screw rod 53, the second baffle plate 52 is internally threadedly connected to the second screw rod 54, and a transmission component 6 is provided at the bottom of the driving rod 57. During the flow of liquid, the first screw rod 53 and the second screw rod 54 are rotated, and the first baffle plate 51 and the second baffle plate 52 are driven to start moving through the transmission component 6.

[0053] The transmission component 6 includes a first transmission gear 61 fixedly sleeved on the outer end of the first screw rod 53, a second transmission gear 62 fixedly sleeved on the outer end of the second screw rod 54, the first transmission gear 61 is meshingly connected with the second transmission gear 62, a first friction wheel 63 is also fixedly sleeved on the outer end of the second screw rod 54, a second friction wheel 64 is fixedly sleeved on the outer end of the driving rod 57, a friction belt 65 is sleeved on the first friction wheel 63 and the second friction wheel 64, and a spring roll 66 is also sleeved on the driving rod 57.

[0054] Specifically, a working chamber is opened inside the liquid pushing plate 32, and the transmission component 6 is arranged inside the working chamber. One end of the spring roll 66 is fixedly connected to the outer wall of the driving rod 57, and the other end is fixedly connected to the inner wall of the working chamber, so that the driving rod 57 is always subjected to the reset force of the spring roll 66 during the rotation process.

[0055] During the movement of the liquid pushing plate 32, the liquid impacts the blade 58, causing the driving rod 57 to rotate slowly. The bottom of the driving rod 57 is sleeved with a second friction wheel 64, and the second friction wheel 64 rotates with the first friction wheel 63 by means of a friction belt 65. Therefore, the driving rod 57 and the second screw rod 54 have the same rotation direction. Since the first transmission gear 61 is meshed with the second transmission gear 62, the first screw rod 53 and the second screw rod 54 have opposite directions. Therefore, no matter whether the liquid pushing plate 32 rotates clockwise or counterclockwise, it can be ensured that the rotation directions of the first screw rod 53 and the second screw rod 54 are opposite. Therefore, under the rotation of the first screw rod 53 and the second screw rod 54, the first baffle plate 51 and the second baffle plate 52 move in an staggered manner. For example, when the first baffle plate 51 moves downward, the second baffle plate 52 moves upward, or vice versa. At this time, during the movement of the liquid pushing plate 32, the purpose of blocking the groove can be achieved by the first baffle plate 51 and the second baffle plate 52.

[0056] The above structure makes the hydraulic resistance provided by the push plate 32 for the rotation of the brake hub 27 gradually increase, and ultimately not only can it solve the problem of brake hysteresis of the brake pad 26 itself, but it can also cooperate with the brake pad 26 for braking, effectively avoiding excessive friction on the brake pad 26, which limits its service life; not only that, due to the excessive pressure required for braking, a depression will be formed in the contact area between the brake pad 26 and the brake hub 27, and by blocking the groove of the push plate 32, the oil pressure in one of the brake pad 26 areas is increased, and the increase in oil pressure there will form a uniform thrust on the surrounding area, and this thrust is not only related to the pressure of the brake pad 26, but also to the friction between the brake pad 26 and the brake hub 27. The mutual clamping increases the friction of the brake pad 26, thereby improving the braking effect of the brake pad 26. At the same time, it also serves as a counterforce to each other, providing a counterthrust to the area that should have formed a recessed area, resulting in a reduction in the phenomenon of recessed areas. Not only that, since the hydraulic oil can evenly distribute the pressure, the contact area with the greatest pressure between the brake pad 26 and the brake hub 27 is no longer the maximum stress point, but is evenly distributed to all areas of the brake hub 27 that are in contact with the semi-zone hydraulic oil. Finally, it is worth mentioning that the hydraulic oil can absorb heat. When the friction pad and the brake hub 27 generate heat, the hydraulic oil can also absorb the heat in time to cool the friction area.

[0057] See also Figure 1-2 An agricultural gearbox with the parking mechanism includes the above-mentioned parking mechanism, including a gearbox body 1, the gearbox body 1 includes a shell 11, a gear set 12 is arranged inside the shell 11, the gear set 12 includes an output gear 14, an output shaft 13 is fixedly sleeved on the output gear 14, and the output shaft 13 is fixedly connected to the brake hub 27.

[0058] The gearbox is provided with a hydraulic drive mechanism, which is manually controlled to provide sufficient rotational force to the platform rod so that the brake pad 26 is close to the brake hub 27. The gearbox has its own brake mechanism that can automatically disconnect the output shaft 13. This parking mechanism is only used to prevent the agricultural crawler vehicle from sliding down the slope. When the vehicle starts to slide down the slope, the lifting rod 22 can be lifted to use the brake pad 26 for parking braking.

[0059] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A parking mechanism, comprising a brake component (2), wherein the brake component (2) comprises a brake cover (21), and a front end of the brake cover (21) is rotatably connected to a lifting rod (22), characterized in that: The inner wall of the brake cover (21) is fixedly connected with a positioning shaft (24), a pair of brake shoes (25) are rotatably connected to the positioning shaft (24), a pair of brake pads (26) are arranged on the brake shoes (25), a brake hub (27) is also arranged in the brake cover (21), the brake hub (27) is connected to the transmission shaft, a bent angle protrusion (28) is rotatably connected in the brake cover (21), and a driving shaft (29) is fixedly connected to the side end of the lifting rod (22); The brake hub (27) is provided with a cavity (31), the cavity (31) is filled with hydraulic oil, a flow blocking component (4) is provided in the cavity (31), the flow blocking component (4) includes a flow blocking plate (42), and the angled protrusion (28) rotates with the flow blocking plate (42) during the rotation process, thereby preventing the hydraulic oil from passing through one side of the flow blocking plate (42); A hydraulically assisted brake component (3) is arranged inside the brake hub (27), and the hydraulically assisted brake component (3) includes a fluid pushing plate (32) and a baffle (34). The brake hub (27) includes an outer ring (272) and an inner ring (271) rotatably connected to the outer ring (272). The fluid pushing plate (32) is arranged on the inner ring (271), and the baffle (34) is fixedly connected to the inner wall of the outer ring (272). During the rotation of the brake shoe (25), the fluid pushing plate (32) and the baffle (34) are in conflict with each other, forcing the brake hub (27) to rotate with the fluid pushing plate (32) during the rotation, and cooperate with the baffle (42) to use hydraulic pressure to assist braking.

2. The parking mechanism according to claim 1, characterized in that: The flow-blocking component (4) further comprises a first rotating shaft (41) rotatably connected to the inner wall of the outer ring (272); the inner wall of the flow-blocking plate (42) is fixedly sleeved with the outer wall of the first rotating shaft (41); the inner wall of the angled protrusion (28) is fixedly connected with a second rotating shaft (43); a first belt pulley (44) is fixedly sleeved on the first rotating shaft (41); a second belt pulley (45) is fixedly sleeved on the second rotating shaft (43); and a transmission belt (46) is provided on the first belt pulley (44) and the second belt pulley (45).

3. The parking mechanism according to claim 2, characterized in that: The hydraulic auxiliary braking component (3) also includes a push rod (33) slidably connected to the inner wall of the inner ring (271), the top of the push rod (33) is fixedly connected to an arc plate (37), the bottom of the liquid pushing plate (32) is provided with a first movable groove, the arc plate (37) slides inside the first movable groove, the top of the arc plate (37) is fixedly connected to a push shaft (35), the top of the push shaft (35) is fixedly connected to a pressure plate (38), the top of the liquid pushing plate (32) is provided with a second movable groove (36), and the pressure plate (38) is slidably connected to the inside of the second movable groove (36).

4. The parking mechanism according to claim 3, characterized in that: The push plate (32) is provided with a groove in which the hydraulic oil flows. During the rotation of the brake shoe (25), the pressure plate (38) extends and contacts the baffle (34), so that the brake hub (27) is subjected to resistance from the hydraulic oil during the rotation.

5. The parking mechanism according to claim 4, characterized in that: A flow limiting component (5) is arranged on the liquid pushing plate (32), and the flow limiting component (5) comprises a first baffle plate (51) and a second baffle plate (52), the first baffle plate (51) and the second baffle plate (52) are both slidably connected to the inside of the groove, and the first baffle plate (51) and the second baffle plate (52) are initially located in the middle of the groove. During the movement of the liquid pushing plate (32), the first baffle plate (51) is driven to move upward and the second baffle plate (52) is driven to move downward, or the first baffle plate (51) is driven to move downward and the second baffle plate (52) is driven to move upward until the groove is blocked.

6. The parking mechanism according to claim 5, characterized in that: The flow limiting component (5) further comprises a liquid guide plate (56) fixedly connected to the inner wall of the groove, the groove is rotatably connected to a driving rod (57), the driving rod (57) is fixedly connected to a plurality of blades (58), the first baffle plate (51) is internally threadedly connected to a first screw rod (53), the second baffle plate (52) is internally threadedly connected to a second screw rod (54), and a transmission component (6) is provided at the bottom of the driving rod (57), and during the flow of the liquid, the first screw rod (53) and the second screw rod (54) are rotated, and the first baffle plate (51) and the second baffle plate (52) are driven to start moving through the transmission component (6).

7. The parking mechanism according to claim 6, characterized in that: The transmission component (6) comprises a first transmission gear (61) fixedly sleeved on the outer end of the first screw rod (53); the outer end of the second screw rod (54) is fixedly sleeved with a second transmission gear (62); the first transmission gear (61) and the second transmission gear (62) are meshingly connected; the outer end of the second screw rod (54) is also fixedly sleeved with a first friction wheel (63); the outer end of the driving rod (57) is fixedly sleeved with a second friction wheel (64); the first friction wheel (63) and the second friction wheel (64) are sleeved with friction belts (65); and the driving rod (57) is also sleeved with a spring roll (66).

8. The parking mechanism according to claim 7, characterized in that: The push rod (33) is a telescopic structure and is provided with an elastic mechanism therein, and a reset member is provided on the inner ring (271).

9. An agricultural transmission with the parking mechanism, comprising the parking mechanism according to any one of claims 1 to 8, characterized in that: The invention comprises a gearbox body (1), wherein the gearbox body (1) comprises a shell (11), a gear set (12) is arranged inside the shell (11), the gear set (12) comprises an output gear (14), an output shaft (13) is fixedly sleeved on the output gear (14), and the output shaft (13) is fixedly connected to a brake hub (27).

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